Planets
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- Planets
Pluto, plutoid: What’s in a name?
In 2006, an international organization changed the classification of Pluto from planet to "dwarf planet."
- Planets
Mercury unveiled
A new mission to Mercury is revealing surprising, never-before-seen details about the innermost planet.
- Planets
Venus unveiled
A recent mission to Venus has revealed new information about that planet's watery past.
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- Planets
Planet Survivor
Scientists have discovered a planet outside our solar system that survived the rapid growth of its parent star.
- Planets
Two Suns in the Sky
Some planets may orbit double stars, which means that the planets might have double sunrises and double sunsets.
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- Planets
An Earthlike Planet
Astronomers have discovered an Earthlike planet that could have liquid water, and perhaps life, on its surface.
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- Planets
Martian Caves
New images taken by a spacecraft orbiting Mars show what appear to be entrances to caves.
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